Thomas a



(No Model.)

T. A. EDISON. PHONOGRAPH.

No. 437,426. Patented Sept. 30, 1890.

I'Illil l U ITED STATES PATENT OFFICE.

THOMAS A. EDISON, OF LLEWELLYN PARK, NEW JERSEY.

PHONOGRAPH.

SPECIFICATION forming part of Letters Patent No. 437,42Qdated September 30, 1890. Application filed August 10, 1889. Serial No, SZOAOO. (N0 model.) 7

T0 aZZ whom it may concern.-

Be it known that I, THOMAS A. EDISON, a citizen of the United States, residing at Llewellyn Park, in the county of Essex and State of New Jersey, have invented a certain new the phonograph. More especially'my object 7 is to provide means for indicating upon the record a point at which a pause is made in dictating to the instrument, and also to provide means for removing from the phonogram-surface the fine chips or shavings which are produced by the cutting action of the recording-point.

The first of the above-named objects I accomplish by means of a marking-pencil, which is adjustable to and from the phonogram-surface. When a pause is made in the operation of the machine, such pencil is moved momentarily against the phonogram, and makes a mark thereon, which indicates the point on the record where the pause occurs, so that the operator can go back to this point when he recommences speaking.

The second object I accomplish by means of a wiper hung to the frame of the instrument and resting constantly, when the parts are in operative position, against thecylinder and in line with the recordin g=point and moving with the parts which carry the recordingpoint, so that itwipes or scrapes from the surface the chips or shavings referred to.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is an end view of a phonograph provided with devices embodying my invention; Fig. 2, a front elevation of the cylinder and spectacleframe thereof, and Fig. 3 a perspective view of the parts which embody my invention detached from the machine.

A is the phonogram-cylinder of the phonograph, and B the cylindrical phonogram-blank placed thereon.

C is the rocking ho1ding-ar1n carrying the spectacle-frame D, which holds the recorder E and reproducer F.

G is the yoke which forms the-backrest for the spectacle-frame. Upon the pin a at the middle of said yoke is placed a collar 1), se-

j cured by a set-screw c. From this collar extends a spindle d, on the end of which is '5. 1 sleeved a box or frame 6. On the spindle d is coiled a spring f, one end of which is at tached to the collar b and the other end to the frame e. The top of the frame eis formed as a thumb-piece g. The frame 6, which turns on the spindle 01, carries the marking-pencil which preferably consists of a slotted tube h adjustable in which is a stick 1' of the mark ing material, which is preferably a mixture of parafiine and lamp-black, this being a sof material which will not injure the surface on which it acts.

The operation of this device will be readily understood. When the person using the pho nographpauses for any reason, he momenta- .70 rily presses the thumb-piece g, which throws 2 the point of the pencil forward against the cylinder. The pencil, made as described, makes a smooth black mark on the surface of? the revolving cylinder without indenting or scratching such surface, and such mark will indicate the place on the record at whic the a. pause occurred. On releasing the tlfl piece the spring f throws the pencil' its normal position. 30 Also secured to the lug is of the collar 1) 18 an arm Z, which extends downwardly toward the phonogram-cylinder be t e 6 0 6 or reproducer. Pivoted on a pin m at the end of this arm is the wiper 'n, which is preferably a light piece of brass with its end bent at an angle, as shown, so that it rests lightly by its weight against the surface of the phonogram or phonog'ram-blank.

As is now well known, my phonograph is provided with a cutting-tool for turning off the surface of the blank, and this tool is pro ,vided with a chute for conveying away from it the chips or shavings removed by it. I, however, also use a cutting-tool as the recording-point of the phonograph, and this also restick to the surface of the cylinder, and may impair the record or affect the operation of Q signed to remove these particles, and be I placed in line with the recording-poi an moves very fine particles of material which the reproducing-point. The wiper n is de moving with it along the blank the Wings removed thereby strike againstthe end of sai wiper and are thus removed from the surface, preferably falling through a recess in the bent end of the Wiper into the receptacle beneath the machine. The wiper 11 does not re- Z quire any adjustment for cylinders of differ- ,ent thickness, since it will always swing forward by its own weight until stopped by the ,cylinder, against which'it rests so lightly as .jnot to injure the surface, although suff ciently m to remove the light particles.

What I claim is- 1. The combination, with a phonograph hav- ';ing a recorder, reproducer, and phonogramjsurface, of a marking-pencil mounted on the rgjiphonograph, movable to and from the phonofgram-surface and adapted to mark the end i' of a record without mutilatin g the recording isurface, substantially as set forth.

2. The combination,withaphonograph havg a recorder, reproducer, and phonogramirface, of a marking-pencil pivotally suported adjacent to the phonogram-surface and movable-to and from said surface, and adapted to mark the phonograph surface without mutilating the same, whereby the end of the record may be indicated, substantially as set forth.

3. The combination, with a phonograph having a phonogram-blank and the usual or suitgdjgfable operating parts, of an additional markq -i ng-pencil mounted on the phonograph and.

-- Iginovable to and from the blank, whereby the Tend of the record may be indicated, substanftially as set forth.

4. The combination, with a phonograph having a recorder, reproducer, and phonogramblank, of a pencil of soft material, such as jparaffine and lamp-black, mounted on the phonograph, in definite relation to the reer and movable to and from the blank,

Where the end of the record may be indi- Gated, S stantially as set forth.

5. The combination, with a phonograph having a recorder, reproducer, phonogram-surface, and means for operating the same, of a marking-pencil pivoted to the phonograph in a definite relation to the path of record, and the spring for retracting said pencil, whereby the end of the record may be indicated, substantially as set forth.

6. The combination, with a phonograph havin g a recording-point, phonogram-surface, and operating mechanism, of the wiper resting lightly against the 'phonogram-surface continually while the phonograph is in use, substantially as set forth.

7. In a phonograph, the combination, with the cutting recording-point, of a wiper resting against the phonogram-surface in position to remove the loose material formed by the operation of said point and carried by a traveling part so as to move therewith, substantially T as set forth.

8. In a phonograph, the combination, with the cutting recording-point, of a loose pivoted plate resting against the phonogram-surface in position to remove the loose material formed by the operation of said point, substantially as set forth.

9. In a phonograph, the combination, with the cutting recording-point, of a wiper resting by gravity against the phonogram-surface in position to remove the loose material formed by the operation of said point, substantially as set forth.

This specification signed and witnessed this 20th day of July, 1889.

THOS. A. EDISON.

Witnesses: v

D. H. DRISCOLL, I. O. BENNETT. 

